Welcome to the future. Spheres and curves are the design du jour. Folks don't need cars to get around - they can teleport and beam around at will. What a strange place!
(either that, or it's a 10-second daylight slow shutter exposure at the Mission:Space ride at Epcot).
Very cool futuristic scene - it looks like the people are materializing right before your eyes! How did you get a 10 sec exposure - did you use an ND filter?